Sash and sash guiding means



Aug. 26, 1947'. E. M. TRAMMELL, sa, Er Al. 2,426,474

4 SASH AND SASH GUIDING MEANS i Filed March 24, 1944 2 sheets-'sheet 1 Aug. .26, 1947. 5 E. M. TRAMMELL, sR., E1- AL 2,425,474

s'AsH AND vsAsH GUIDING MEANS Filed March 24, 19421 2 sheds-sheet 2 Patented Aug. 26-1947 UNITED SS PATENT I@EFFICIEI `-`.EarlM.l Trammell, Sr., and'Earl M. Trammell, Jr.; St. Louis, M0.

.ApplicationMarc'hf2/4, 1944, Serial No.-527,930

Thisv invention relates to` improvements. in-.sash and sash guiding meansgandlmore particularlyto an improved construction of .sliding sash, sashway features Vanni sash. guiding hardware, alldesigned particularly to the end of assuring a freely operating` sash at all .times-,and under all'conditions. The improvements. are ,particularly applicable tothe usual sliding, .double-hung window sash, with onlynegligible modication of yexisting,.moreor less stan-dard sashandframestructure.

A .number of Vserious shortcomings, .evident :in standard types of slidingsash, manifest `.themselves particularlyin excessivebindingdue tounusual l or vunintended .frictional effects, preventing a window sash, Vfor example, vfrom sliding smoothlyand without undue effort, in the sashway; a seconddominant Vand-prevalentl diiculty manifests itself in kan inability with prevalent sash and.. fname constructions y to maintaina-suit able andfsatisfactorfy weather seal between sash' andsashway elements without employing complete weatherstripequipment, and without sacrifcing free running .operation ofthe sash in its sashway.

Thenoted difficulties arise inheretofore vpre-valent millwork because of two -principal factors, viz., aninabilityof the `manufacturer' to yassure that .inside stops and other-.elements whichheretofore have-been assembled onthe -job, are properly and accurately `located .so as to -assure fa free running sash, and onewhichwilly permanently remain `in affully-,operativecondition. :Aseoond important factor, among others, arisesfrom the possibility, in Awood sash constructions, that either originally orbecause of weathering -.eifects, sash `stiles and sashway or frame .elements will sometimes .become warped, so -as to preclude Y smooth operation,orevenvatitimeswarped to an exaggerateddegree suchas topreclude any possibility of movementof sash in the sashway withoutl partial destruction or disassembly. ASuch warp-ing effects attimes willfresultfinb-adly bowed sash stiles or other verticalelementsforoccasionally, due to warping, .some vof the .stile .elements will 'become twisted in amanneralmost to preclude sliding movement .of fthe sash. .A .further adverse lfactorgenerally to be .contended with, particularly in new construction, is .the effect .of paint, varnisnor otherfnishingmaterials which,

i 'by reasonof uneven application or adhesions'resulting between relatively slidable elements, will often .preclude .satisfactory sash operation.

The present inventionaccorilng'ly has as ageneral .obrjecta construction of. sash and sashway,

'together ywith certainsashl'iar'dware, all of such nature .asffully to obviate thel prevalent 'difficultieslabovenoted, and l.to assure smooth and easy sash movement at all`times and under all .conditions, while ,providing "for ia depend-ably tight weatherv Seal about the margins ofthe sas'li'when in .or near closedpos'ition.

A further and'important object of the invention isl attained in improved sash. guiding means which provide'for afdistinct weather sealing-displacement of the `.sash in a direction depthwise of thesashwaygincident to sliding movement of the sash -as-it approaches andattains closedposition.

`Yet a 'further important object yof 'the present improvementsyis attained in aprovisionfor permitting a somewhat more than usual operating clearance between the .sides of a slidingsashbetweenth'e sash and stationary stile elementssucli as pulley Stiles 'for example, .together withfimproved sash attachments which serve fthe dual function of tending to center .the 'sash at all times in a direction depthwise of the sashway and which 'also eiect a centering action ofthe sash'laterally, li. e. rin Aits own plane, to rightor left, inthe sashway.

Yet a further-obj ect of the invention is attained in attachment lhardware which Ymay 'be applied to Astandard-sliding sash with but aminimum of wood working roperations to effect such attachment.

A'ifurtheriobject ofthe invention isattained inthe provision of special xtures 'for the y.purposes? noted, suchthat .they'mayb-e either app-lied to standard sash by carpenters at the building, or with equal "facility and .advantage be applied by the` manufacturer with almost no disturbance of existing designs and existing wood working facilities, 'and ,yet will serve lfully to `attain the several.objects"heretoforeexpressed. f

The foregoing and-still funthenadvantages will more .clearly appear lfrom the lfollowing detailed description of a single preferred example lof 'the invention .as applied \to a `double-hung standard window -sash -and frame ronly slightly modified,

and from the drawings illustrating such embodiment, in which:

Fig. 1 is a front elevation, viewed from the room side, of a double hung sliding sash and frame work constituting a sashway therefor, as installed;

Fig, 2 is an enlarged vertical sectional elevation as viewed along line 2-2 of Fig. 1;

Fig. 3 is a fragmentary horizontal section as viewed along line 3-3 of Fig. 1, illustrating portions of one side of the sash when in closed position;

Fig. 4 is a view taken similarly to Fig. 3 but illustrating the sash, sash fixtures and certain elements of the sashway, when the sash is in open position;

Fig, 5 is a fragmentary View of one edge of one of the sash with a guiding fixture attached, and showing the latter on a somewhat larger scale than in preceding gures;

Fig. 6 is a side View of the fixture and sash portion shown by Fig. 5, the structure of Fig. 6

being viewed at a right angle to .that of Fig. 5, and

Fig. 7 is a top view of one of the fixtures as same would appear when viewed from line '1 -'I of Fig. 5.

Proceeding now to a description of the selected example by characters of reference to the drawing, the upper sash is indicated generally at Il, and the lower sash at II. As a prevalent construction, each sash comprises sash stiles I2 and I3, check rails I4 and I5, inside casing IE, stool I'I, apron I8, an inside stop i9, together with other of the usual conventional framing and sash elements, as will be readily understood to those familiar with the art.

lIhe sash assembly as manufactured and distributed includes at each side, a vertical stile, sometimes known as a pulley stile, indicated at 25. Secured to the stile at each side of the assembly is a blind stop 25, an inside stop IS and an intermediate stop usually designated as a parting bead 28. According to usual and heretofore prevailing practice, the inside stop is applied by the carpenter on the job, or at the time of installing the sash at the building. Due usually to lack of proper care or lack of any accurate gauging device, the inside stop is often set too tightly against the bottom sash, with the effect that, afterrpainting, or due to moisture absorption, or for other reasons, the sash be,- comes tight and fails to slide freely in the guide grooves therefor. This diiculty has been obviated by routing a recess Within which is firmly set the inside stop I9, at the factory,.

rather than on the job. Even though later applied on the job, the location of the stop I9 is fixed by the recess 3U. VThis has an advantage, as will later more readily appear, of providing for a definite width of sashway, particularly for the lower sash. Similarly the parting bead 28 is inset into the stile 25, for which purpose there is provided a groove 3l, this being in keeping with prevailing practice.

It will have appeared that the elements 25,

25, I9 and 28 are duplicated on the oppositev side of frame assembly, and as will appear from their relation to the sash elements Il) and II serve collectively to constitute a guide at each side of each sash which guides are, for` brevity hereinafter collectively referred to as a sash-v way. It should here be noted that the vertical (pulley) stile 25 on each side, is provided with a longitudinal groove 32 substantially midway between the inside stop I9 and parting bead 28, and with a similar such groove 33 about midway between the parting stop 28 and the blind stop 26. As will later more clearly appear, these grooves cooperate with certain of the sash guiding xtures to be described, in keeping the sash centered, each in its sashway as the sash is raised or lowered.

Although it is desired, at least for the present, to disturb as little as possible, present trade expectations and manufacturing practices, it is nevertheless an extreme preference to provide a substantially greater clearance for the sash, in a direction depthwise thereof, than is prevalently provided by millwork manufacturers, in Afact it has been found by trials that double the prevalent clearance, will not be excessive from either an operative point of view, or that of appearance. Similarly, we regard it as of irnportance and contributing materially to best results with the present improvements, to provide considerably more than usual clearances between sash stiles and adjacent pulley stiles, at each edge margin of the sash. By preference the usual total clearance is augmented, in fact doubled, being at least 1A inch in windows of conventional residence sizes, and may be increased to an even greater extent if desired.

The present improvements contemplate the provision of at least two, but by preference four guiding and sash sealing iixtures for each sash Y of a double hung window assembly, these being generally indicated by location, at F in Fig. 1,

vthere being, for each sash, one fixture F near each opposite upper corner and one at each opposite lower corner. A further departure from conventional sash construction incident to Vpresent improvements, will perhaps best appear from Figs. 2 and 4 wherein it is seen that the sash stiles are each rabbeted longitudinally over at least one-half their thickness, thus resulting in the undercut portions or recesses il, these being relatively oppositely located as will appear from Figs. 3 and 4, these rabbeted portions serv- Fig. 2. Each of the xtures F is shown as including a base which may consist of a plate element of partly channel form, indicated at ill,-

and secured in place in the rabbeted recesses therefor, by mounting screws 42, of which any` suitable number may be employed and which extend through suitable apertures (not shown) in the base 4I. The base-includes a relatively narrow upper portion (Fig. 5) one margin of which is -upturned at about a right angle to the plane of the base to constitute a flange indicated at 43. This serves as will readily appear, as a support for a relatively heavy highly tempered spring 44, securement of the spring being effected as through rivet-s [l5 to the flange 43. The nose or bearing portion of this element 44 consists of a substantially rounded member carried by the spring 44 as an extension thereof, the elements dll' and 46 constitutinga J-shaped ,spring of fairly substantial loading. The lowermost (Fig. 5) somewhat wider portion of base 4| is provided with an upturned right angular flange portion 50, a second such portion 5l and a third such portion 52. Pivotally connected to the base plate 4I is a bow spring 53 characterized by asubstantially rounded outer portion 5d, secured to which is a guide projection or luglof substantially cylindricalform 55, which if desired may consist of .a roller mounted on a headed pin. The bow spring 53 is secured pivotally to the plate through a pivot Vpin55, about which the spring 53 is free to move as a lever, arcuately within limits, being normally held in a position substantially parallel with and lengthwise of the base plate l by engagement with the stop constituted by the upturned flange or lug 50. Pivoted member 53-55 is yieldably biased into this position, as shown by Fig. 5, by means of a leaf spring 50 secured, as by rivets El to the flangei?. It .will now have appeared that the spring 53 when moved slightly counterclockwise (Fig. 5) about the pivot 55, will serve to load or stress the spring 65, and when not subjected to any such turning moment, the spring 6U will serve to keep the J-spring 53-54 centered between spring 59 and stop Eil. Extreme counterclockwise movement of the pivoted member is precluded by abutment of a tail extension 62 with the flange 5I, which serves as a stop or limiting member for this purpose.

To complete the sash guiding and biasing hardware there is provided, one for each of the fixtures F, a biasing block or camming element 65. There are necessarily structurally separate from, but functionally closely cooperative with the fixtures F, and are located in the sashway, by preference secured to the inside stop I9 for the lower sash, and to the blind stop 25 for the upper sash, in positions such that each of the camming blocks is adapted for wiped engagement by and in biasing cooperation with the associated J-spring ail-45. In construction each of the blocks 55 consists of a somewhat elongate member depthwise perforated for the reception of fastening screws 55, and provided at one end with a nose portion 6l of reduced thickness continuing into a wedge surface, thence merging into a portion of uniform depth, each block being for example, of a length of 1% to 21A" for windows of usual or standard dimensions.

rlhe manner of installation of the several fixtures F will readily appear from Figs. 2, 3 and 4, installation being easily directed by a suitable paper template packaged with eachset, or a standard metal template of permanent construction. Their function and operation will first be discussed in referenceto the coaction of the .lsprings td-5 in cooperation with'the biasing or camming elements 55. There has heretofore been noted the more-than usual depthwise clearance provided facewise along the margins of the sash, in the sashway. Considering first Fig. 4 showing the sash in open position, it will appearthat since the guide grooves32 and 33 are substantially rectilinear, the centering action of springs 55, considered depthwise of the sash, will serve through theengagement of projections or lugs 55 in the grooves 32 and 33 when the sash is open, tokeep it substantially with a uniform working clearance on both insideandoutside margins of the sash stiles working between the-stops. This condition will readily Vappear from Fig. 4. Assuming now for example, that the lower sash is brought to approach a closed position; its rounded portions It-Will first engagethe'reduced ends 5'! ofthe camming or ,biasingmember 55, with-the eifect that,fas .the sashis vbroughtifarther ltoward closed position, itis then cammedorbiased toward the parting bead t28. Due to the substantial loading ofspring-M, this effect, preferably'imparted atboth top and bottomv of the sash-serves to bring itilrmly and snugly into weather sealing relation in the joint 68 between the-sash stile and parting bead. As soonhowever, as the sash is moved out of closed position, upwardly if the lower sash, or downwardly if the upper, within the rst inch or slightly more, of opening movement, the loading of spring 44 through engagement of member 46 by the camming element`65 is released, and the sash is again permitted to move away from contact with the parting stop, under which conditions the rounded member 46 works entirely free of the adjacent stop element.

Referring now to the function of thelateral balancing features including the pivoted spring 53-54 and the guide projection or lug 55 carried thereby, it will appear that the member 53 is free to be flexed toward and away from the plate 4l as shown by the arrows (Fig. 6) while also permitting a pivoting action at a right angle to this direction ofmovement as shown by the arrows of Fig. 5. The function of spring 60 having been heretofore noted, it is now seen that the member 53 serves in effect as a compound spring, since it is capable of independentmotion in either of two planes at a right angle to each other.

When the sash is in open position, the parts will appear substantially as shown by Fig. 4, wherein is observed the unusual clearance along each side margin of the sash, as indicated at'15. Similarly, the abnormal working clearance between the sash stiles and stops, in a direction depthwise of the sash, as indicated at '16. Under these conditions the lugs or projections 55 of each of the fixtures will ride smoothly in the grooves 52-33 therefor and the rounded element 54 of each of the spring assemblies 53-54 will bear against the inwardly facing vertical surface of the sashway, specifically as shown, the vertical or pulley stile 25. It will appear-that this condition obtains normally in all Apositions of the sash in the sashway except during the last inch or two of sash closing or first sash opening movement. It will also have appeared that, dueto the elaborate clearance provisions, in case of any warping of the sashway elements or sash stiles, there is still permitted at least an adequate working clearance in spite of any local dimunition thereof because of warping effects. In numerous experiments over a number of months, and in sash actually produced, it has been found that the present improvements serve to provide a sufficient operating clearance with free sash operation even under the most eXtreme conditions encountered by reason of warping effects or inaccurate assembly.

When the sash is in substantially open position, in spite of the clearances provided both depthwise of the sash opening andlaterally in the plane of the sash proper, there will nevertheless be exhibited no undesirable looseness of the sash in the sashway such as might cause rattling and unwarranted noise. Such effects are assured against chiefly byA two provisions, namely, the fact that the sash is centered depthwise of the opening due to the engagement or projection of lugs 55, in the grooves Y32, etc., therefor. Also, theefect of springs y6!) in biasing each of the springs 53 about its pivot against the stops 50will at once indicate thatthe sashcannotbe moved depthwise-in one direction and can only bevmoved 7 depthwise in the`opposite direction by loading the springs 6U. Similarly, any chattering or rattling of the sash in its own plane, in the sashway is precluded by the fact that the springs 53, being in effect oppositely biased bow springs and of virtually equal loading, will keep the sash centered in its own plane.

There remains to be considered in operation, the function and effect of the springs 53, considered as levers pivotal about elements 56 against the biasing or loading of springs G, particularly when the sash is brought iirst to approach, thence fully into closed position. As heretofore described the entire sash will be cammed or biased into sealing relation against one of the stops, in the example shown toward the parting stop 28. It being a preference that spring lll be of considerably greater loading than spring 60 of each fixture F, the spring @Il is llexed only to a minor extent as the sash is closed. I-Iowever, in accordance with preference the guide grooves 32 33 are rectilinear throughout their lengths, being vertical or substantially so. when the sash is cammed or biased into sealing relation with the parting bead, there results a movement of spring 53 to a slight extent in a counterclockwise direction (Fig. against the loading of the associated spring Eil, which being lighter in loading than spring M, will be predominantly stressed, it being noted that spring 60 bears against a downturned lip or flange ll on the spring 53. Thus, when the sash is again opened to such an extent that the rounded portion 46 clears the camming plate or block 5E, springs 60 will again serve to coact in the centering action of the sash depthwise oi the sashway.

t will have been observed that when the sash is closed there is produced an effective weather seal in each of the zones (i3 (Fig. 3) along the vertical margins of the sash. The slope usually given to the horizontal rails of the lower sash, for example where the bottom rail bears against or upon the sill, will produce effective weather seal along the lower horizontal margin. Similarly, according to usual practice the check rails of a double hung sash being sloped, or chamfered to mate along a plane at an acute angle to the horizontal, will create an effective seal therebetween, since the sash are biased toward each other in a Zone intermediate of the window opening. However, if and as desired, a weather strip of suitable form may be employed between the check rails of the sash, being mentioned herein merely for completeness but as constituting per se, no part of present improvements.

The foregoing description of parts and operation has been directed principally to parts, lixtures, matters of clearance and actuation of the lower sash of double hung sash assembly. The description applies equally to the upper sash, which accordingly will require no further detailed description. It is of course well known in the art that in double hung sash of the general type selected for exemplication of the improvements, the upper sash will close incident to full upward movement instead oi full downward movement. It will have appeared also that the fixtures F are, in their present form, preferably produced in both right and left handed types, and may be used either in a relatively upright or relatively inverted position, as will clearly appear from Fig. 2 wherein those at the lower extremities may be said to be inverted relative tothose near the upper extremities of yeach sash,

Thus y It is contemplated that the xturesas heretofore notedV may be and preferably are factory installed; it is however equally within the purview of the developments that the xtures be produced, packaged and sold as such. Although operative in a single pair for each sash, distinctly best operation is attained by the use of two along each lateral margin of each sash, thus indicating as preferable a packaged'article containing eight of the fixtures F together with the same number of the camming blocks E5, together with screws 5,2 and 66 in required number.

It will now have appeared that the present invention serves fully to attain each of the several objects specifically above enumerated, and others implied from the description of operative combinations. Although the invention has been described by making reference in detail to a single preferred embodiment, the detail of description is to be understood solely in an illustrative sense, numerous variants being possible within the scopeY of the claims hereunto appended.

We claim as our invention:

l. In a slid-able sash assembly, a sash, stops and stiles forming a sashway of substantially greater depth than the thickness of the sash stiles, the assembly including a projecting member carried by one of the vertical elements of the assembly, and a channeled member substantially vertically disposed along the sashway with the projecting member guidedly operable in and along the channeled member, one of'said members being pivotally supported and resiliently positioned to permit a yielding displacement of the sash, in a direction depthwise thereof, in substantially any position of the sash along the sashway.

2. In a window and sash assembly, a slidable sash,'stops including a parting bead, and stiles forming a sashway of substantially greater depth than the thickness of the sash Stiles, and of substantially greater width than the sash, a xture at each side of the sash, a spring pressed element carried by the fixture, a camming member inkthe sashway adapted to be engaged by the spring urged element in one position of the sash, and positioned to urge the sash toward the parting bead when the sash is in said position, and spring means carried by each fixture, and coacting with the stiles to center the sash between the stiles.

3. In a sash construction including a slidable sash with stops and stiles forming a sashway, the sashway being of appreciably greater width and depth than the sash proper, resilient sashcentering elements between the fixed stile members at opposite sides of the sashway, and the adjacent vertical sash stiles, the centering elements being so located between the fixed stile members and sash stiles as to tend to bias the sash to a substantially centered position in the plane of the sash and laterally within the sashway, whereby to maintain substantially an equalV working clearance edgewise of and on opposite vertical margins of the sash, the vertical stiles at each side of the sashway being vertically grooved, and a guide pin carried by each of the sash-centering elements, and extending into the adjacent stile groove.'

4. In a window construction including a slidable sash, stops and stiles forming a sashway of substantially greater'depth than the thickness of the sash stiles and of substantially greater Width than that of the sash, a pair of curved vwhen the sash is inand near closed position, `for 'biasing the-sash into sealing relation-With certain ofthe'stops, -a pair-of resilient sash-centering elements, locatedoney at each side of the sash and mounted thereon,-being biased outwardly toward the vertical--stiles cfg-the sashwayand tending to bias the sash to a substantiallycentered ,position in the plane of the sash, laterally Within the sashway, said vertical stiles being `provided with vertical channels, and a lug carried byy each Yof Vsaidresilient velements, and, projecting horizontally therefrom-so as to extend is opened and closed.

5. In combination in a sash and sashway, a sash xture adapted for guiding and centering the sash in the sashway therefor, the iiXture including a mounting base, a normally horizontal guiding projection, and spring means through which the projection is yieldably connected to the base and biased relatively thereto, both along the plane of, and depthwise of the sash.

6. A iixture for application to the edge face of a sliding sash in a sashway therefor, the i'lX- ture including a mounting base, a guide .pin projecting outwardly of the base and adapted to Work along a channel provided therefor in the sashway, and spring means tending to hold the guide pin in a normal position on the base, but permitting a, yielding displacement of the pin across the base.

'7. A sash guiding xture adapted normally to maintain a sash centered laterally in its own plane, in a sashway, the xture including a base for securement to a vertical sash stile, a spring carried by and projecting outwardly of the base, a .projection carried by substantially the outermost portion of the spring and adapted to function as a guide element for the sash when extended into a cooperating guide channel, the projection and spring being pivotally mounted on the base to permit a compound movement of the projection relativeto the plate and sash by which it is carried.

8. In a fixture for guiding a slidable sash, a base adapted for mounting the Xture in a sashway, a guide lug adapted to enter and cooperate with a longitudinal sash guiding channel, and spring means through which the lug is swingably assembled to the base, in a manner tending to maintain a predetermined relation or the lug to the base, yet permitting a yieldably controlled arcuate movement of the lug across the base as well as toward and away from the base.

9. In a iixture for guiding a slidable sash, a base adapted for mounting the xture on a sash, a guide lug adapted to enter and cooperate with a longitudinal sash guide channel, a spring by which the lug is carried and secured to the base and yieldably urged outwardly of the sash, the spring being pivotally connected to the base, a second spring carried by the base and serving to bias the rst said spring toward a centered position on the base, and stop means on the base for limiting pivotal movement of the spring.

l0. In an attachment fixture for sliding sash, a base adapted for attachment to a vertical stile of the sash, a sash centering spring pivotally mounted on the base, a lug carried by the spring and thereby urged outwardly of the base and adapted for sash guiding operation in an adjacent longitudinal stile channel, a second spring 'l5 into and operate along the channels as the sash von-,thebase:serving yieldablyto maintain the 'lrst saidfspring and lug in av centered position onthe base, anda third spring `carried by the baseand mounted for'iiexure in a direction at a 'right angle tofthe directionoflexure of the irst..;said spring and adapted for cooperation with a camming elementin the sashwayto bias the sash into weather'` sealing relationin a sash- -way when the sash is in or near closed position.

'11. In a window construction including'a slidable sash, together withxstops and Stiles assembled to constitute-.a sashway for guidingly retaining thesash for Vertical sliding movement, the sashway being of appreciably greater width and depth than-the sash-proper, the sashway including vertical pulley Stiles-each of vwhich is provided with a rectilinear guide channel substantially centrally disposed, depthwise of the sashway, resilient sash centering elements of which at least one is disposed at each side of the sash between fixed stile members and sash stiles, the centering elements being carried by the sash and each characterized by an outward bias in the plane of the sash whereby to maintain substantially an equal working clearance marginally of and in the plane of the sash, spring means coasting with the centering elements and tending therewith, to maintain the sash in a freesliding, centered relation depthwise of the sashway, and a projection on each of said resilient centering elements, and adapted to work along and in the guide channels.

12. In a window construction including a slidable sash, together with stops and stiles assembled to constituteA a sashway for guidingly retaining the sash for Vertical sliding movement, the sashway being of appreciably greater width and depth than the sash proper, and provided with a vertical channel, sash centering elements of which at least one is disposed at each side of the sash between fixed stile members and sash stiles, the centering elements being carried by the sash and each characterized by an outward bias in the plane of the sash whereby to maintain substantially an equal working clearance marginally of and in the plane of the sash, spring means coacting with the centering elements and tending therewith, to maintain the sash in a free-sliding, centered relation depthwise of the sashway, the sash centering elements further each including a bow spring and a lug projecting substantially horizontally therefrom, and means whereby the lug may be yieldably displaced from a normally centered position depthwise of the sash, as the sash encounters any inequalities in the sashway incident to movement therein.

13. In a slidable sash assembly, a sash stop' and stiles forming a sashway of substantially greater depth than the thickness of the sash stiles, the assembly including a guide lug carried by and extending at about a right angle to a sash stile, the sashway being provided with a guide track along which the lug is guidedly operable as the sash is raised and lowered, yieldable means, including a lug-carrying arm, coacting with the lug to permit a relative displacement of the guide lug and sash in a direction depthwise of the sashway, and means positioned to act upon the sash at one extreme of its range of sliding movement, to displace the sash depthwise of the sashway and against one of the stop elements of the sashway.

14. In a Window and sash assembly, a slidable sash, stops, including a parting bead, and stiles forming a sashway of substantially greater depth than the thickness of the sash stiles, and of substantially greater Width than the sash, a fixture carried laterally by the sash, a, spring pressed element carried by the fixture, a cammng member inthe sashWay adapted to be engaged by the spring pressed element in one position of the sash, and positioned to urge the sash toward the parting bead when the sash is in said position, and additional spring means carried by the sash and coasting With the stiles tending to center the sash between the Xed stiles.

'EARL M TRAMMELL, SR.

EARL M. TRAMMELL, JR.

REFERENCES CITEDV The following references are of vrecord in the le of this patent:

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